arcosolium
noun
ar·co·so·li·um
ˌärkəˈsōlēəm
plural arcosolia
-lēə
: an arched cell in a Roman catacomb
especially : one designed to receive a sarcophagus
Word History
Etymology
New Latin, from arco- (from Latin arcus bow) + Latin solium seat, sarcophagus, from sedēre to sit